Biology - Human Reproduction Question with Solution | TestHub
Which of the following begins to develop with the onset of puberty in females?
Options:
Answer:
Solution:
Oogenesis is initiated during the embryonic development stage when millions of oogonia are formed within each fetal ovary. These cells enter into prophase-I of meiotic division and get temporarily arrested at that stage, forming primary oocytes.
Each primary oocyte gets surrounded by a layer of granulosa cells to form a primary follicle. A large number of these follicles degenerate from birth to puberty. At puberty, only to primary follicles are left in each ovary.
With the onset of puberty, these primary follicles get surrounded by more layers of granulosa cells and a new theca to form secondary follicles. Therefore, secondary follicles begin to develop only after the onset of puberty, whereas oogonia, primary oocytes (immature ova), and primary (primordial) follicles are formed before birth.
Answer: Secondary follicles
